Chair-seat spider.



H. W. BQLENS. CHAIR SEAT SPIDER. APPLICATION FILED mam. 1915.

PatentedNov. 27, 191?.

HARRY W. BDLENS, F PORT WASHINGTON, WISCONSIN.

CHAIR-SEAT SPIDER specification of Letters Patent.

Patented Nov. 2?, 1191"? Application filed February 4, 1915. Serial N 0. 6,027.

To all whom it may concern:

Be it known that I, HARRY W. Bonnns,

a citizen of the United States, and resident of Port Washington, in the county of ()zaua kee and State of .Visconsin, have invented certain new and useful Improvements in Chair-Seat Spiders; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention refers to pressed steel chair irons and has for its object to provide a simple, durable, light one-piece saddle for the support of the spider arms and also a one-piece spindle-head upon which the saddle is mounted, the two members being pressed into shape by simple die operations.

lVith the above objects in view the inven tion consists in certain peculiarities of construction and combination of parts as set forth hereinafter with reference to the accompanying drawings and subsequently claimed.

1n the drawings Figure 1 represents a side elevation of a seat spider embodying the features of my in vention, with parts broken away and in section to more clearly illustrate various details of construction, the section being inclicated by lines 1-1 of Figs. 2 and 3;

Fig. 2, a similar sectional view taken at a right-angle to that shown in Fig. 1, the section being indicated by line 2 of Fig. 1;

Fig. 3, a detailed sectional plan view of the head portion of said spider mechanism,

and

Fig. 4:, a detailed plan view of a tension lever.

Referring by characters to the drawings, 4t) 1 represents a threaded spindle, the upper end of which extends through a central aperture of the head A. The head is formed from a pressed steel blank and in order to provide a bearing of the desired length for the spindle, the said head has riveted or otherwise secured thereto a centrally apertured bowed plate 2, which aperture is in alinement'with the head aperture and the spindle is confined between the spaced members by upsetting in the usual manner. The head is formed with a base portion 3 which carries the central spindle aperture and said base portion is also provided with side slots 4, as best shown in Fig. 3. The transverse edges of the base portion of said head are folded downwardly to form ears 5 ust outside of the slots 4: and the rear edge of said a transverse bridge piece 8 that terminates.

with downwardly folded wings 8 having narrow end portions 8" which project through the head slots l and are fulcrumed upon a rod 9 that is mounted in the ears 5 of the head. Thus it will be seen that the saddle is capable of rocking back and forth and its movement is limited by the end faces of the slots 4. The bridge-piece of the dle is centrally depressed to form a fore and aft channel 10 into which is seated the fore and aft spider arm 11, the said spider arm and channel being in parallel relation to the downturned wings. Thus it will be seen that this spider arm, when seated, is riveted or otherwise secured to the bottom portion 10 of the channel and its upper edges are flush with or slightly below the upper plane of the bridge-piece. The usual transverse spider arm 11 is fitted over the first mentioned spider arm and rests upon and is secured to the high portions of the bridgepiece 8 by rivets or other suitable means. Hence it will be seen that the fore and aft spider 11, which is subjected to greatest strains, is firmly seated within a wall channel whereby its rigidity is insured.

The head of the tension bolt 7 which projects above the base portion of the head A is fitted through an aperture in a tension lever 12 having a fulcrum finger 12 that engages the upturned lip 7. The forward end of the tension lever 12 terminates with a hook for engagement of one end of a coiled spring 14-, the opposite end of the same being secured to a clip 14 which projects from the front end of the fore and aft spider arm 11.

The bolt 7 is in threaded union with a nut 14", which nut engages the bottom face of the base portion of the head and serves to regulate the tension of the coiled spring 14.

From the foregoing description it is obvious that the chair iron so constructed as a whole is light and durable and that the parts may be manufactured at a minimum cost both with reference to machine work and assemblage.

As best shown in Fig. l, the tension lever is apertured for the reception of the tension bolt 7 and the upper face of said lever is formed- With a'straight shoulder 12" for notched engagement with the straight face of the tension bolt head, whereby said bolt, when seated within the lever, is'held against rotation coincident to adjustment of the tension bolt 14'.

1 I claim:

A chair iron comprising a spindle carried plate havin one portion dished, an oppositely dishec plate secured to the dished portion of the first plate, a spindle having one end reduced to form a shoulder, said reduced portion being passed through the dished parts of the plates and headed,

whereby said dished portions are held bea tween the head of the spindle and said shoulder thereof, said spindle carried plate also being provided with longitudinal slots in its side portions, depending ears at the sides of the last mentioned plate adjacent said lots, a pivot bolt carried by said ears,

Copies of this patent may be obtained for five cents each, by addressing the Commissionr of Eatents,

Washington, D. 0.

a spider saddle plate bent into inverted U- shape, the lower ends of the legs of said plate being reduced in width, disposed a second spider arm secured on the saddle -j plate and disposed transversely of the first spider arm, said second spider arm engag= ing the top; of the :first 1 and forming: a sup 'plemental securing means therefor.

In testimony that I claim the foregoing j I have hereunto set my hand at'Milwaukee in the county of Milwaukee and State of isconsin in the presence of two witnesses;

HARRY W. BoLENs. a

Witnesses:

Geo. W;. YO NG, M. E. DOWNEY. 

